An Unintended Complementarity: How the Outpatient Pooling Policy Increases Inpatient Services in China
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ID: 314874
2026
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Abstract
This study investigates the relationship between outpatient and inpatient services within China's tiered healthcare system following the implementation of outpatient pooling reform. Data were sourced from official administrative healthcare service records across counties in Sichuan Province (2010-2020) and individual survey data from the China Health and Retirement Longitudinal Study (CHARLS) (2011-2018). Using a staggered difference-in-differences (DID) design with an imputation model, we identified an unexpected increase in hospital admissions post-reform, which was contrary to the policy's intent to optimize healthcare resource allocation. We found that increased use of outpatient services was positively associated with demand for inpatient care, demonstrating a complementary effect. Mechanism analysis revealed that the rising hospitalization admissions were partly attributable to two factors: (i) expansion of outpatient service in primary care institutions generating an induced hospitalization effect that contributed to the rise in inpatient volume, and (ii) hospitals improving inpatient service efficiency by shifting selected preoperative tests to the outpatient account. These findings confirm the complex interaction between outpatient and inpatient services, and underscore the need for a more effective design of the medical insurance payment system to enhance the efficiency of China's healthcare services.
| Reference Key |
openalex_W7162294986
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|---|---|
| Authors | Yì Wáng, Mengyao Zhang, Miao Yu |
| Journal | Health policy and planning |
| Year | 2026 |
| DOI |
10.1093/heapol/czag073
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| URL | |
| Keywords | Keywords not found |
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